The Construction of Analogy-Based Research Programs: The Lock-and-Key Analogy in 20th Century Biochemistry. By Rebecca Mertens. Bielefeld (Germany): transcript Verlag; distributed by Columbia University Press, New York. $40.00 (paper). 224 p.; ill.; no index. ISBN: 978-3-8376-4442-5 (pb); 978-3-8394-4442-9 (eb). 2019.